s390/3270: introduce device notifier

Add a notifier to create / destroy the device nodes for the tty view
and the fullscreen view. Only device nodes for online devices are
created and the device names will follow the convention as outlined
in Documentation/devices.txt: 3270/tty<x> for the tty nodes,
3270/tub<x> for hte fullscreen nodes and 3270/tub for the fullscreen
control node.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 9 insertions, 2 deletions

diff --git a/drivers/s390/char/raw3270.h b/drivers/s390/char/raw3270.h
index ed34eb2199cc..a4c79d043cd3 100644
--- a/drivers/s390/char/raw3270.h
+++ b/drivers/s390/char/raw3270.h
@@ -91,6 +91,7 @@ struct raw3270_iocb {
 
 struct raw3270;
 struct raw3270_view;
+extern struct class *class3270;
 
 /* 3270 CCW request */
 struct raw3270_request {
@@ -192,8 +193,14 @@ struct raw3270 *raw3270_setup_console(struct ccw_device *cdev);
 void raw3270_wait_cons_dev(struct raw3270 *);
 
 /* Notifier for device addition/removal */
-int raw3270_register_notifier(void (*notifier)(int, int));
-void raw3270_unregister_notifier(void (*notifier)(int, int));
+struct raw3270_notifier {
+        struct list_head list;
+        void (*create)(int minor);
+        void (*destroy)(int minor);
+};
+
+int raw3270_register_notifier(struct raw3270_notifier *);
+void raw3270_unregister_notifier(struct raw3270_notifier *);
 void raw3270_pm_unfreeze(struct raw3270_view *);
 
 /*